Article Per Year (5 Year)
p-Index From 2021 - 2026
1.383
P-Index
This Author published in this journals
All Journal Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur Jurnal Mechanical Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) International Journal of Engineering and Emerging Technology Natural Sciences Engineering and Technology Journal Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan
Made Suarda
Program Studi Teknik Mesin, Universitas Udayana
Aerospace Engineering Arts Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Social Sciences Transportation

Published : 30 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 30 Documents
Search

 1   2   3 
Pengaruh Diameter Lubang Snifter-Valve Terhadap Peningkatan Tekanan Dalam Tabung Udara Pompa Hydram Made Sucipta; Made Suarda; I Nengah Suweden
Jurnal Energi Dan Manufaktur Vol 12 No 1 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.507 KB) | DOI: 10.24843/JEM.2019.v12.i01.p08

Abstract

Pompa hydram telah banyak diaplikasikan terutama di daerah pedesaan atau perbukitan dimana ketersediaan suplai energy listrik menjadi kendala. Pompa hydram adalah pompa mekanis yang memanfaatkan peningkatan tekanan (water hammer) yang terjadi akibat mekanisme penutupan katup limbah secara tiba-tiba. Untuk itu pada badan pompa hydram dipasang tabung udara untuk mengurangi denyutan aliran air hasil pemompaan. Dalam kurun waktu tertentu operasi pompa hydram, jumlah udara yang ada dalam tabung udara akan terus berkurang. Untuk menggantikan volume udara dalam tabung udara tersebut maka pompa hydram dilengkapi dengan katup penghirup udara (snifter-valve). Namun dalam implementasinya, katup ini hanya berupa lubang berdiameter 1 ÷ 2 mm pada jarak sekitar 2 cm di bawah katup tekan pada badan pompa hydram. Namun sampai saat ini belum ada acuan diameter lubang snifter-valve tersebut. Oleh sebab itu, pada penelitian ini diinvestigasi besarnya peningkatan tekanan yang terjadi dalam tabung udara pompa hydram. Pada penelitian ini pompa hydram dilengkapi dengan katup hirup dengan variasi diameter lubangnya yaitu 0,5, 1,0, 1,5, 2,0 dan 2,5 mm. Hasil penelitian menunjukkan bahwa pada model pompa hydram dengan pipa penggerak berdiameter 1¼ inchi yang diuji, peningkatan tekanan yang terjadi dalam tabung udara berkisar antara 0,4 sampai dengan 0,5 bar. Snifter-valve dengan lubang berdiameter 1,5 mm menghasilkan peningkatan tekanan water hammer tertinggi dalam tabung udara sehingga memberikan kerja tertinggi yang terjadi dalam pompa hydram. Hydraulic ram pumps have been implemented and installed mainly in hilly or remote area where they are facing public electrical supply problem. Hydraulic ram pumps are mechanical pumps that utilize the increased water hammer due to the sudden shutdown mechanism of the waste valve. Therefore, the hydraulic ram pump is equipped with air vessel to reduce the pulsation of the pumping water flow. Within a certain period of hydraulic ram pump operation, the amount of air present in the air vessel will continue to decrease. In order to replace the air volume in the air vessel, the hydraulic ram pump is equipped with a snifter-valve. However, in its implementation, this valve is only a hole with a diameter of 1 ÷ 2 mm at a distance of about 2 cm below the delivery valve on the body of the hydraulic ram pump. However, there has not been any reference for determining the diameter of the snifter-valve hole yet. Therefore, in this study, works carried out for investigating the magnitude of the increased pressure that occurs in the air vessel of hydram pump. In this study, a hydraulic ram pump equipped with a snifter-valve with various orifice diameters of 0.5, 1.0, 1.5, 2.0 and 2.5 mm. The results show that for the hydraulic ram pump model with 1¼ inch diameter of the drive pipe that tested, the incrising pressure in the air vessel is about 0.4 up to 0.5 bar. The snifter-valve with 1.5 mm orifice diameter generates the highest incrising pressure of water hammer pressure in the air vessel, therefore, it gives the maximum work in the hydraulic ram pump.
Rancangan Alkaline Fuel Cell Sederhana dengan Menggunakan Stainless Steel sebagai Elektrodanya I Made Suardamana; Made Sucipta; I Ketut Gede Sugita; Made Suarda
Jurnal Energi Dan Manufaktur Vol 7 No 1 (2014): April 2014
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.606 KB)

Abstract

Penggunaan stainless steel sebagai material elektroda pada alkaline fuel cell telah diteliti. Adabeberapa tipe/seri stainless steel yang mudah didapatkan di pasaran, yaitu seri 430 dan seri304. Pada penelitian ini telah dikaji penggunaan kedua seri pelat stainless steel tersebut biladigunakan sebagai elektroda dengan disusun secara seri pada rangkaian pengujiannya.Rangkain seri tersebut dirancang untuk penggunaan 1 pasang, 2 pasang dan 3 pasangelektroda. Selama pengujian, untuk melihat pengaruhnya tersebut, konsentrasi KOH yangdigunakan sebagai elektrolit juga divariasikan dari konsentrasi 10% sampai 70% berbasismassa. Dimensi efektif elektroda yang digunakan adalah sebesar 90 mm x 200 mm, denganjarak antar anoda dan katoda sebesar 10 mm. Supply hidrogen dan oksigen dijaga masingmasingpada tekanan 1 bar dan 0,5 bar secara berturut-turut. Hasil pengujian menunjukkanbahwa dengan perbedaan konsentrasi KOH pada elektrolit akan memberikan suhu operasiyang berbeda. Semakin tinggi konsentrasi KOH semakin tinggi pula suhu elektrolit yangdihasilkan. Performa alkaline fuel cell yang lebih baik ditunjukkan bila menggunakan pelatstainless steel seri 304 dibandingkan menggunkan pelat stainless steel seri 430, dan padakonsentrasi KOH yang paling tinggi dicapai performa yang paling tinggi pula. Pengunaan 3pasang elektroda yang tersusun seri juga menunjukkan hasil yang terbaik dibandingkandengan menggunakan 1 atau 2 pasang elektroda, baik itu dari sisi tegangan, arus dan dayalistrik yang dihasilkan.Kata Kunci: Alkaline fuel cell, stainless steel, susunan elektroda, konsentrasi KOH, performaThe use of stainless steel as an electrode material in alkaline fuel cells has been investigated.There are several types/series stainless steel that is easily available in the market, namely the430 series and 304 series. In this studies, the use of the series of stainless steel plates whenused as electrodes arranged in series with the circuit testing have examined. Combination of theseries is designed to use 1 pair, 2 pairs and 3 pairs of electrodes. During the test, to see theeffect, the concentration of KOH used as the electrolyte in this experiment is also varied from10% to 70% based on mass. Dimensions of effective electrode used in this experiment is equalto 90 mm x 200 mm, the distance between the anode and cathode is kept at 10 mm. Supply ofhydrogen and oxygen respectively maintained at a pressure of 1 bar and 0.5 bar respectively.The test results showed that the difference in concentration of KOH electrolyte will give adifferent operating temperature. The higher concentration of KOH, the higher electrolytetemperature will be generated. Alkaline fuel cell better performance demonstrated when usingstainless steel plates 304 series instead of using the stainless steel plate 430 series, and at thehighest concentration of KOH, the highest performance is achieved anyway. The use of 3 pairsof electrodes are arranged series also showed the best results compared to using 1 or 2 pairs ofelectrodes, both in terms of voltage, current and power output.Keyword: Alkaline fuel cell, stainless steel, electrode composition, KOH concentration,performance
Kajian eksperimental head losses katup limbah pompa hydram Made Suarda; Ainul Ghurri; Made Sucipta; I Nengah Suweden
Jurnal Energi Dan Manufaktur Vol 10 No 2 (2017): Oktober 2017
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.413 KB)

Abstract

Abstrak Disain katup limbah yang baik dan penyetelan panjang langkah (stroke) yang tepat merupakan faktor penting untuk operasi pompa hydram yang halus dan efisien. Katup limbah harus mampu menutup dengan cepat untuk menghasilkan tekanan tinggi pada saat terjadi water hammer. Disain detail katup limbah meliputi luas lubang katup limbah, luas penampang piringan katup, dan panjang langkah katup. Penelitian sebelumnya menyarankan bahwa diameter lubang katup limbah harus sama atau lebih besar dengan diameter pipa penggerak untuk menghindari terhambatnya aliran air keluar katup limbah. Namun diameter optimal katup limbah belum diketahui. Katup limbah tertutup akibat gaya drag yang terjadi karena aliran air melewati katup tersebut. Jadi geometri katup limbah adalah sedemikian rupa sehingga gaya seret tersebut meningkat dengan cepat sesuai arah pergerakan katup tersebut menuju posisi tertutupnya. Friction drag mengakibatkan kehilangan energi atau head losses aliran air melewati katup limbah yang merupakan besarnya perubahan energi aliran sebelum dan sesudah katup limbah tersebut. Head losses tersebut dapat diinvestigasi dengan mengukur tekanan di bawah katup limbah dan debit aliran yang mengalir melewati katup limbah tersebut pada posisi kesetimbangannya. Hasil penelitian menunjukkan bahwa rasio diameter lubang katup limbah terhadap diameter pipa penggerak yang mengakibatkan head losses terendah adalah sekitar 130 persen atau pada rasio luas penampangnya sekitar 172 persen. Kata kunci: Pompa hydram, katup limbah, head losses, rasio diameter Abstract Suitable design and appropriate stroke adjustment of a waste valve are important factors for smooth and efficient hydram pump operation. The waste valve must be able to close quickly to produce high pressure during a water hammer take placed. In addition, detailed design of the waste valve comprises of the hole-diameter of the valve, the cross-sectional area of valve disc, and the valve step stroke. Prior researches suggest that the hole-diameter of the waste valve should be equal to or greater than the diameter of the drive pipe to avoid obstruction of the outflow passes throught the waste valve. However, the optimal diameter of the waste valve is unidentified yet. The waste valve is closed due to the drag force that take places as the water flow passes through the valve. Therefore, the geometry of the waste valve is such that the drag force increases rapidly as the direction of the valve moves to its closed position. Friction drag results in loss of energy or head losses of water flow through the waste valve which is the magnitude of the change of energy flow before and after the waste valve. Head losses can be investigated by measuring the pressure under the waste valve and the flow discharge flowing through the waste valve at its equilibrium position. The results showed that the ratio of the diameter of the waste valve to the diameter of the diameter of the drive pipe which is resulting in the lowest head losses was about 130 percent or at the cross-sectional area ratio was about 172 percent. Keywords: Hydraulic ram, waste valve, head lsses, diameter ratio
Penentuan dimensi perpipaan sistem pompa paralel Anak Agung Adhi Suryawan; Made Suarda; I Gusti Ketut Sukadana
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1380.347 KB)

Abstract

Abstrak:Sistem pompa paralel direncanakan untuk mendapatkan kapasitas pemompaan yang lebih besar, yaitu hasil perkaliandari kapasitas masing-masing pompa dengan jumlah pompa yang beroperasi. Namun pada kenyataannya di lapangan,kapasitas aliran air yang dialirkan oleh sistem paralel tiga unit pompa booster jauh lebih kecil dari tiga kali kapasitasspesifikasi pompanya. Padahal, jika pompa tersebut dioperasikan hanya satu unit menghasilkan kapasitas sesuaidengan spesifikasi pompanya. Hal tersebut disebabkan karena unjuk kerja sistem pompa sangat dipengaruhi olehsistem instalasi perpipaannya. Untuk itu perlu dilakukan pengujian sistem perpipaan pompa booster untukmendapatkan model instalasi perpipaan yang dapat menghasilkan unjuk kerja yang optimal. Penelitian ini dilakukandengan membuat sebuah model yang serupa dengan aslinya namun dimensinyag diperkecil. Pengujian dilakukan padavariasi diameter pipa header dengan sudut tee pada pipa hisap unit pompa 90o (tee-T) dan 45o (tee-Y), danmemvariasikan panjang serta diameter pipa hisap pompa. Hasil penelitian menghasilkan sebuah prosedur disain danformula dimensi perpipaan instalasi pompa paralel yang menghasilkan unjuk kerja pompa yang terbaik.Kata kunci: Sistem pompa pararel, header pipa, T-yee, pipa isap, unjuk kerja pompaAbstrac:tA parallel pump system is planned to get a greater pumping capacity. Total capacity of a parallel pump is the product ofthe capacity of each pump with the number of operating pumps. But in fact on the most applications, for instant, theflow capacity of water delivered by the three unit parallel pump system is much smaller than three times the capacity ofthe pump specifications. In the other hand, if the pump is operated only one unit it generated capacity in accordancewith the pump specifications. This is caused by that the pump system performance is strongly influenced by the pipinginstallation systems. Therefore, It is necessary for testing the piping system of parallel pump to get a parallel pumppiping model that can produce the best performance. The research was done by creating a parallel pump model that issimilar to the original but with smaller dimension. Tests performed on the header pipe diameter variation with angle ofthe tee on the suction and discharge pipe pump is 90? (tee-T) and 45? (tee-Y), and varying the length and diameter ofthe pump suction pipe. The results of the study find a design procedure and formulas in determining dimension ofpipeline parallel pump installations that generates the best pump performance.Keywords: parallel pump system, header pipe, tee-Y, suction pipe, pump performnace
Appraisal of Technical and Economic Potential Micro Hydro Power in Bali Made Suarda
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (357.644 KB)

Abstract

Energy consumption particularly on electrical energy is continuously rising as a result of economical rising and community development. Therefore it needs to be responded about this condition by developing renewable energy utilization which is available. Renewable energy resources are possibly developed in Bali such as solar energy, wind energy, hydropower, sea energy, and biomass. However, one of renewable energy resources that is mostly possible to be developed in Bali is hydropower in micro scale wich is named microhydro. The microhydro works by using water flow which has debit and head. However, it needs an analysis both on technical and financial analysis. Technical analysis is carried out by checking debit and head of the water flow, and then calculates power would be generated, as well as the microhydro equipments such as a suitable choosen of turbine, generator, and control system. In other hand, financial analisis is carried out by estimating cost for construction the microhydro system, then by using Net Present Value (NPV) analysis to check that the system is profitable to be constructed. The result noted that Bali has some potential microhydros or pycohydros that are profitable to be developed both on rivers and irrigations system. Financial analyses show that microhydro systems are profitable to be constructed (NPV is positive) as long as their heads are at least 10 meters, in other side, debit are more affected their generated powers. However, in their implementations, there are some barriers in utilize those water flow resources as microhydro systems, such as those sites were used for other objects for instant as tourism destinations, or for cultures conservation, and the communities have not knew the advantages of microhydro yet therefore it needs socialization to the communities.
Assessment Performance of Pumps as Hydro-Turbines Made Suarda
Jurnal Energi Dan Manufaktur Vol 3, No.1 April 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (231.333 KB)

Abstract

The basic principle work of hydro-turbines are reversal of pumps, therefore, an alternative solution that can be developed inovercoming problem to get hydro turbines are by using pumps, by flowing water in the reverse direction through in thepumps, as hydro turbines. Those are supported by availability of pumps widely in the market and have been mass-producedhence they were relatively cheap. The aims of this research are to determine performances of pumps as turbines - reversepumps. This experiment assesses performance of two small pumps that are centrifugal ‘diffuser-pump’ and ‘volute-pump’ ashydro turbines with various debit and head of water flow resource, such as output-powers and their efficiencies. The resultsshow that the centrifugal diffuser-pump as hydro turbine performs maximum efficiency about 20,6%, where is as pump fromits brochure suppose 47%. In the other hand, the centrifugal volute-pump as turbine achieves maximum efficiency about32%, where is expected 26% as pump from its brochure. Both type of the pumps present that the maximum efficiency asturbines performed at head of water flow resource through the pumps as high as their maximum characteristic head of thepumps. Furthermore, both pumps as turbines generate high shaft revolution that was about 1.500 rpm at their maximumefficiency. Although those efficiencies are considerably low to an ideal efficiency 100%, however, the volute-pump as turbineperforms a reasonably efficiency (32%) that higher than (at least is same as) the efficiency of its pump characteristic (26%),and this pump available very widely in the market. Should be pointed out that bigger dimension pumps propose higherefficiency up to about 86%, therefore they are expected to give higher efficiency as well. So, centrifugal volute-pumps arepotential alternative solution to be used as hydro turbines.
KAJIAN EKSPERIMENTAL PENGARUH TABUNG UDARA PADA HEAD TEKANAN POMPA HIDRAM Made Suarda; IKG Wirawan
Jurnal Energi Dan Manufaktur Vol 3, No.1 Juni 2008
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (130.422 KB)

Abstract

Pompa hidram bekerja berdasarkan prinsip palu-air. Ketika aliran fluida dihentikan secara tiba-tiba, maka perubahan momentum massa fluida tersebut akan meningkatkan tekanan secara tiba-tiba pula. Peningkatan tekanan ini digunakan untuk mengangkat sebagian fluida tersebut ke tempat yang lebih tinggi. Untuk itu, penelitian ini berusaha untuk mengetahui besarnya head tekanan akibat palu-air pada instalasi pompa hidram dengan dan tanpa tabung udara. Parameter yang diamati adalah besarnya peningkatan tekanan pada pipa penghantar, badan pompa, leher pompa, pipa penyalur serta debit yang dihasilkan pada bak limbah dan bak penampung. Dari hasil penelitian didapatkan bahwa head tekanan balik di dalam pipa penghantar menurun dari 103,87 m tanpa menggunakan tabung udara menjadi 37,85 m dengan tabung udara. Selanjutnya, dalam pipa penyalur head tekanan akibat water hammer meningkat dari 0,29 m tanpa menggunakan tabung udara menjadi 2,9 m dengan menggunakan tabung udara. Sehingga pemasangan tabung udara dapat meningkatkan efisiensi pompa hidram secara signifikan dari 0.72 % tanpa tabung menjadi 19,45 % dengan tabung udara.
Experimental Study of Acceleration Effect To Hydram Pump Performance A.A. Adhi Suryawan; Made Suarda
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.26 KB)

Abstract

The hydram pump is a motorless pump, which is its working mechanism use potential energy only. The hydram pump consists of a component called an air vessel. Until now, it is not exactly known yet what is the effect of air vessel to performance of hydram pump. To get the effect of air vessel to performance of hydram pump can be used indicator diagram. This research carried out by use of head and the length variation of drive pipe of the hydram pump. Then, characteristic in drive pipe and delivery pipe of the hydram pump were observed. The results show that the use of the air vessel in the hydram pump able to decrease the acceleration head significantly which happened in delivery pipe, that is 0,35 meters to 0,04 meters, so that the pumped water to the reservoir through delivery pipe is more stable. In addition, the efficiency increase from 17,03% up to 52,99%. So, the air vessel gives a big effect to the performance of hydram pump.
Kajian Pemasangan Pipa Air Bersih Melayang dalam Air Laut untuk Mendukung Perkembangan Pariwisata di Nusa Ceningan dan Lembongan Made Suarda; I Gusti Komang Dwijana
Jurnal Energi Dan Manufaktur Vol 13 No 1 (2020)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (305.547 KB) | DOI: 10.24843/JEM.2020.v13.i01.p03

Abstract

ir bersih merupakan kebutuhan dasar untuk kehidupan manusia. Demikian pula aktivitas kehidupan di pulau Nusa Ceningan dan Lembongan membutuhkan air bersih. Mengingat kedua pulau tersebut merupakan destinasi wisata pavorit dan berkembang pesat, maka disamping untuk kehidupan masyarakat sehari-harinya (7153 jiwa), ketersediaan air bersih sangat dibutuhkan untuk hotel dan aktivitas pendukung pariwisata. Namun, di kedua pulau tersebut tidak tersedia sumber air bersih. Oleh sebab itu salah satu alternative solusinya adalah menyalurkan air bersih dari pulau terdekatnya yaitu Nusa Penida. Di Nusa Penida terdapat dua mata air yang cukup besar yaitu mata air Guyangan (78 lt/dt) dan Penida (173 lt/dt). Proyeksi kebutuhan air dengan debit harian maksimum 30 lt/dt. Pada kajian ini, kebutuhan air bersih tersebut akan disuplai dari mata air Penida. Pada umumnya pemasangan pipa menyebrang laut dipasang pada dasar laut (seabed) atau mengapung di permukaan air laut. Namun lautan antara pulau Nusa Penida dan Ceningan merupakan jalur pelayaran kapal, dan lautan tersebut merupakan palung curam dengan kedalaman 200 meter maka kedua metode pemasangan pipa tersebut tidak dapat dilakukan. Oleh sebab itu satu-satunya cara adalah memasang pipa melayang pada kedalaman 20 meter di bawah permukaan air laut. Pipa akan menerima berbagai macam gaya-gaya luar akibat tekanan hidrostatis air laut, hydrodinamik arus dan gelombang. Sesuai hasil kajian, pipa menyeberang lautan dengan bentang 1500 meter terdiri dari tiga pipa HDPE berdiameter 140 mm yang dipasang parallel. Setiap pipa menerima gaya hidrodinamik pada arah vertikal 64.050 Newton arah keatas dan horizontal 71.550 N/m. Oleh sebab itu untuk mengamankan pipa dari beban gaya-gaya tersebut maka pipa diikat pada jembatan sling baja stainless berdiameter 110 mm. Disamping itu pada setiap jarak 6 meter pada sling jembatan pipa tersebut dipasangi beton ballast load 350 kg dengan sling penggantung diameter 6 mm. Metode ini pelaksanaannya rumit dan membutuhkan berbagai peralatan pendukung sehingga dibutuhkan biaya kontruksi yang mahal pula. Namun, hal ini perlu dilakukan untuk menyediakan air bersih di Nusa Ceningan dan Lembongan guna meningkatkan perkembangan pariwisata di daerah tersebut. Clean water is a basic need for human life. Likewise the activities of life on the island of Nusa Ceningan and Lembongan need clean water. Considering that the both islands are favorite tourist destinations and are growing rapidly, in addition to the daily life of the community (7153 people), the availability of clean water is needed for hotels and tourism supporting activities. However, on both islands there are no sources of clean water. Therefore, one alternative solution is to distribute clean water from the nearest island, Nusa Penida. On the Nusa Penida there are two fairly large springs, namely the Guyangan spring (78 lt/sec) and Penida (173 lt/sec). The projection of water demand until 2043 at daily maximum capacity is 30 lt/sec. In this study, the need for clean water will be supplied from the Penida spring. In general, the installation of crossing pipeline is installed on the seabed or floating on the sea water surface. However, the sea between the Nusa Penida and Ceningan islands is a ship's shipping lane, and the sea is a steep trough with a depth of 200 meters, so the both methods of mounting the pipe cannot be performed. Therefore the only way is drifting the pipeline at a depth of 20 meters below sea level. The pipe will receive various external forces due to the hydrostatic pressure of seawater, hydrodynamic of currents and waves. According to the results of the study, the pipeline crossing the ocean with a span of 1500 meters consists of three HDPE pipes with a diameter of 140 mm which are installed parallel. Each pipe receives hydrodynamic forces that are vertical force of 64,050 Newton in upper direction and horizontal force of 71,550 Newton. Therefore to secure the pipeline from the load of these forces, the pipe is tied to a stainless steel sling bridge with a diameter of 110 mm. Besides that, at every distance of 6 meters the pipe bridge sling is fitted with a ballast concrete load of 350 kg with a hanging sling of 6 mm. This method is complicated and requires a variety of supporting equipment, so its construction cost is expensive. However, this should be done to provide clean water in the Nusa Ceningan and Lembongan in order to increase the development of tourism in the area.
Pengaruh Diameter Piringan Katup Limbah Terhadap Tekanan Aliran Balik Dalam Pompa Hidram Kadek Bayu Laksana; Made Suarda; Ainul Ghurri
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 5 No 2 (2019)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2019.v05.i02.p06

Abstract

Pompa hidram bekerja dengan memanfaatkan proses palu air. Terjadinya palu air akan mengakibatkan sebagian air menuju ke tabung udara dan sebagian lagi akan mengalami aliran balik pada pipa penggerak. Diameter piringan katup limbah mempengaruhi laju aliran dan gaya tekan di dalam badan pompa, sehingga akan mempengaruhi besarnya tekanan balik yang terjadi. Oleh sebab itu perlu dilakukan penelitian lebih lanjut mengenai pengaruh diameter piringan katup limbah terhadap tekanan aliran balik dalam pipa penggerak pompa hidram. Penelitian menggunakan variasi diameter piringan katup limbah 35 mm, 40 mm, 45 mm, 50 mm, dan 53 mm. Penelitian dilakukan dengan menggunakan kamera berkecepatan tinggi yaitu 960 fps, untuk merekam aliran balik yang sudah disemprotkan gliter sebelumnya. Sehingga didapatkan jarak pergerakan gliter untuk mendapat kecepatan dan pada akhirnya mendapat tekanan. Hasil dari penelitian menunjukkan diameter piringan katup limbah berpengaruh terhadap tekanan balik yang terjadi. Dimana head tekanan tertinggi terjadi pada diameter piringan katup limbah 40 mm sebesar 42.76 N/m2. Diikuti dengan debit pemompaan terbesar pada diameter piringan 42.88 mm sebesar 2.3 liter/menit. Selain tekanan, semakin besar diameter piringan katup limbah akan meningkatkan frekuensi dan efisiensi pompa hidram. Namun debit pembuangan menurun seiring bertambahnya diameter piringan. Hydram pump works by utilizing the water hammer process. Water hammer that take place some water flow into the air tube and some other will back into the drive pipe. The waste valve disk diameter affects the flow rate and the pressure force inside the pump body, so that it will affect the back pressure. Therefore it is necessary to conduct further research on the effect of the waste valve disk diameter to backflow pressure in the hydram pump drive pipe. The work used variations in diameter of 35 mm, 40 mm, 45 mm, 50 mm, and 53 mm. The flow pattern was recorded using a high-speed camera with 960 fps. The water was mixing with glitters. The glitter movement distance is obtained to get the speed and then its pressure. The results that show the diameter of the waste valve influences the back pressure. Finally the highest pressure is on the disk diameter 40 mm at 42.76 N/m2. Furthermore, the largest pumping debit was on a 42.88 mm disk diameter at 2.3 liters/minute. In addition, the larger valve disk diameter cause the higher frequency and efficiency. However, the waste debit decreases with increasing disk diameter.
Co-Authors A.A. Adhi Suryawan A.A.A. Suryawan Ainul Ghurri Anak Agung Adhi Suryawan Cindy Dwi Meylinda Epenetus Rapael Hendra Wijaksana I G.N.O. Suputra I Gede Krisna Pratama I Gede Putu Agus Suryawan I Gusti Bagus Wijaya Kusuma I Gusti Ketut Sukadana I Gusti Komang Dwijana I Gusti Komang Dwijana I K. A. Atmika I Ketut Adi Sugita I Made Astika I Made Suardamana I Nengah Suweden I Nyoman Mariawan I Putu Widiarta I Putu Widiarta I.D.M.K. Muku I.G.K. Sukadana I.K.A. Atmika I.K.G. Wirawan I.M. Astika I.P. Widiarta Ibnu Gusti Muttaqin Ishak Danus K. Astawa Kadek Bayu Laksana M. Sucipta Made Sucipta Ni Made Suaniti Putu Lokantara